Communication Via Profibus And Profinet; Connect The Frequency Inverter To Profibus - Siemens Sinamics G120 CU240E Operating Instructions Manual

Functions
5.11 Operation in fieldbus systems
5.11.2

Communication via PROFIBUS and PROFINET

5.11.2.1

Connect the frequency inverter to PROFIBUS

Assignment of the SUB-D connector to connect to the PROFIBUS-DP network
Control Units CU240S DP and CU240S DP-F of the frequency converter are equipped with a
SUB D connection for the PROFIBUS cable.
Table 5- 55
The SUB D connection is suitable for the SIMATIC RS 485 bus connector.
Recommended PROFIBUS connectors
We recommend one of the following connectors for the PROFIBUS cable:
1. 6GK1500-0FC00
2. 6GK1500-0EA02
Both connectors are suitable for all SINAMICS G120 Control Units with respect to the angle
of the outgoing cable.
Note
PROFIBUS communication when the 400 V supply for the frequency inverter is switched off
If the frequency inverter is only supplied via the 400 V line connection for the Power Module,
the PROFIBUS connection for the Control Unit is interrupted as soon as the power supply is
disconnected. To prevent this, the Control Unit must be connected to a separate 24 V power
supply via terminals 31 (+24 V I
160
Contact assignment of the 9-pole SUB D connection
Contact Designation
1 Shielding
2 U0V
3 RxD/TxD-P
4 CNTR-P
5 DGND
6 VP
7 U24V
8 RxD/TxD-N
9 -
Housing Cable shield
) and 32 (0 V I
n
Description
Ground connection
Floating and reference point for user
supply
Receive/transmit data P (B/B')
Control signal
Reference potential for PROFIBUS
data (C/C')
Plus pole for supply voltage
Floating user supply +24 V at 100 mA
Receive/transmit data N (A/A')
Not assigned
Cable shield
).
n
Operating Instructions, 08.10. 2008, t.b.d.
Area
RS 485
TTL
5 V ± 10 %
RS 485
Frequency inverter